Extended Data Fig. 9 |^31 P{^1 H} NMR spectra for biphasic electrochemical
capture and release of UO 2 2+. a,^31 P{^1 H} NMR spectrum of electrochemically
reduced 1 in DCE to produce 2b. b,^31 P{^1 H} NMR spectrum of DCE layer following
UO 2 2+ capture from the aqueous layer containing UO 2 (NO 3 ) 2 (THF) 2 in 0.1 M
sodium acetate buffer. c,^31 P{^1 H} NMR spectrum of an electrochemically
oxidized DCE layer containing 3N/4N following extraction of UO 2 2+ into 0.1 M
sodium acetate buffer. Minor unknown byproducts (marked by asterisks) are
also observed. Detailed experimental conditions are found in Methods.